Core Insights - Two energy companies, DTK and XELLL, achieved a perfect "Compliance Score" of 10 out of 10 on a ten-point scale for their junior subordinated notes due in 2085 [1] Group 1 - The article highlights the performance of DTK and XELLL in the context of preferred stocks and compliance ratings [1] - It indicates that investors may have varying preferences for securities based on their compliance scores, suggesting a range of investment strategies [1]